package com.cheng.HomeWork;

public class A {
    public static void main(String[] args) {
        B b = new B();
        b.setX(-100);
        b.setY(-200);
        System.out.println("sum="+b.getXYSum());
    }
}

class B{
    int x = 100,y = 200;
    public void setX(int X){
        x = x;
    }
    public void setY(int y){
        this.y = y;
    }
    public int getXYSum(){
        return x+y;
    }
}